html, body, .site {
  margin: 0;
  height: 100%;
  font-family: "Avenir", Helvetica, Arial, sans-serif;
  color: #2c3e50;
}
#app {
  display: flex;
  height: 100%;
}
.site {
  display: flex;
  flex: 1;
  flex-flow: column nowrap;
}